# coding=utf-8
# Copyright 2020 The Google AI Perception Team Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""Download AIST++ videos from AIST Dance Video Database website."""
import argparse
import multiprocessing
import os
import sys
import urllib.request
from functools import partial

SOURCE_URL = 'https://aistdancedb.ongaaccel.jp/v1.0.0/video/10M/'
# LIST_URL = 'https://storage.googleapis.com/aist_plusplus_public/20121228/video_list.txt'
LIST_URL = os.path.join(os.path.dirname(__file__),'video_list.txt')
print(LIST_URL)
s= ''
with open(LIST_URL,'r') as r:
    s=r.read()
seq_names= s.split('\n')
# print(type(s))
# print(s_list)
    # print(r.readline())


def _download(video_url, download_folder):
    save_path = os.path.join(download_folder, os.path.basename(video_url))
    urllib.request.urlretrieve(video_url, save_path)


if __name__ == '__main__':
# if 1==0:
    parser = argparse.ArgumentParser(
        description='Scripts for downloading AIST++ videos.')
    parser.add_argument(
        '--download_folder',
        type=str,
        required=True,
        help='where to store AIST++ videos.')
    parser.add_argument(
        '--num_processes',
        type=int,
        default=1,
        help='number of threads for multiprocessing.')
    args = parser.parse_args()
    os.makedirs(args.download_folder, exist_ok=True)

    # seq_names = urllib.request.urlopen(LIST_URL)
    # seq_names = [seq_name.strip().decode('utf-8') for seq_name in seq_names]

    video_urls = [
        os.path.join(SOURCE_URL, seq_name + '.mp4') for seq_name in seq_names]

    download_func = partial(_download, download_folder=args.download_folder)
    pool = multiprocessing.Pool(processes=args.num_processes)
    for i, _ in enumerate(pool.imap_unordered(download_func, video_urls)):
        sys.stderr.write('\rdownloading %d / %d' % (i + 1, len(video_urls)))
    sys.stderr.write('\ndone.\n')